What part does 'C' identify in a ventilation system?

In a ventilation system, the component identified as 'C' is the ventilation port, which plays a crucial role in facilitating the exchange of air. The ventilation port is the entry or exit point for air, ensuring that fresh air can be brought into the environment or that stale air can be expelled. Proper airflow management through these ports is vital for maintaining indoor air quality, regulating temperatures, and preventing the buildup of pollutants.

Understanding the function of the ventilation port is essential for operators to ensure that a system is designed effectively, allowing for proper circulation and compliance with environmental regulations. The other components mentioned, such as the fan, duct, and filter, all serve important functions in the ventilation process, but it is the port that directly connects the system to the environment.